 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
 <head>
 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 <title>第一个简单的JavaScript程序</title>
 <script type="text/javascript">
    var s=window.prompt("请输入您的密码!");
 </script>
 	</head>
 	<body>
 	</body>
 	</html>
